"Amino Acids - Branch Chain" are among the most beneficial and effective vitamins in any nutrition or bodybuilding program.
These are the essential aminos:

• leucine
• isoleucine
• valine

The essential branched chain amino acids (BCAA's) are of special importance for athletes because they are metabolized in the muscle, rather than in the liver. Here's how this works: After digestion once protein is broken down into individual amino acids these aminos can either be used to build new proteins or be burned as fuel to produce energy.